| RefNo | DM/4/120 |
| Level | Item |
| Title | Letter from R Byham, Board of Ordnance, to the Secretary of the Royal Society |
| Date | 6 July 1827 |
| Description | Requesting the Royal Society's opinion on the matter of lightning conductors at Purfleet Magazine. |
| Extent | 2 sides |
| Format | Manuscript |
| AccessStatus | Open |
| AccessConditions | OPEN - but photocopying forbidden. |
| RelatedMaterial | See CMB/1/21 Lightning Conductors Committee. |